This option is deprecated, use /UseUpdateService instead.
The bypass_wsus option bypasses any configured WSUS and forces WuInstall to access the Windows Update site.
If a WSUS is configured, WuInstall changes the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU, Value UseWuServer from 1 to 0, which means that no WSUS should be used.
If you type
WUInstall.exe /search /bypass_wsus
and a WSUS is configured, the output is:
You are using WSUS Server http://mywsus.local:8530 bypass_wsus specified, bypassing WSUS ... successful!
After the execution of WuInstall, resetting the UseWuServer value to 1 restores the initial state.
bypass_wsus specified, reactivating WSUS ... successful!
When the execution of WuInstall is aborted for some reason before WuInstall can reset the registry value, it has to be reset manually!
The /use_wsus option works similar to the /bypass_wsus option, but you can specify another WSUS, which is valid during the execution of WuInstall (or it allows you to switch from no WSUS at all to a certain WSUS).
WuInstall manipulates the following registry keys:
and stores the initial values for resetting them after WuInstall has finished.
For example, if you have WSUS http://mywsus.local:8530 configured, and want to go to the WSUS http://mywsus2.local:8530, you type:
WUInstall.exe /search /use_wsus http://mywsus2.local:8530
and WuInstall puts out:
You are using WSUS Server http://mywsus.local:8530 use_wsus specified .... WUServer and WUStatusServer successfully set to http://mywsus2.local:8530
After the execution of WuInstall, the initial state is restored (in this example, the WSUS is reset to http://mywsus.local:8530)
use_wsus specified, deactivating WSUS again resetting WUServer to http://mywsus.local:8530, WUStatusServer to http://mywsus.local:8530 ... successful!
When the execution of WuInstall is aborted for some reason before WuInstall can reset the registry values, they have to be reset manually!
When an error occurs while trying to install an update using WSUS, WuInstall automatically tries again to install the updates bypassing the WSUS using Microsoft Update.
When an error occurs while trying to install an update using WSUS, WuInstall automatically tries again to install the updates bypassing the WSUS using Windows Update.